package io;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class Text {
    public static void main(String[] args) throws IOException {
        FileOutputStream fos = new FileOutputStream("fos.txt");
        int i = 0;
        while (true){
            fos.write(97+i);
            i++;
            if (i>25){
                break;
            }
        }
        System.out.println("完毕");
        fos.close();
    }
}
